Right, the rules seem to vary. Some country locations use bore holes, and in many places there is rationing of this resource as it does not all exist just for you. Then there are those who only use simply trigger sprays on a hose pipe.This in many cases is seen as being responsible, even if the neighbours report you. Grey water or rain water from a But you can do what you like with that, but the main thrust as was pointed out ont ' radio the other day, is the use of sprinklers which are just left on to keep the lawn green.
These days however, increasingly underground holed pipes are used for this, and nobody know except by your metered supply Then there is washing the car, Mixing concrete which of course has to still go one, and I've never heard of any common ruling there. There is even in some places where people are disabled and cannot carry watering cans, special privileges, but you have to ask.
I personally feel anyone growing food in their garden should be able to use water, if we are serious about getting good food at cheaper prices. Brian